Vernier GDX-CUR
Vernier GDX-CUR is designed for exploring the basic principles of electricity. Use Go Direct Current to measure currents in low voltage AC and DC circuits. With a range of ±1 A, this sensor is ideal for use in most “battery and bulb” circuits. It features:
- Bluetooth and USB connectivity for easy data collection and analysis
- ±1 A and ±0.
Vernier GDX-CUR
Vernier GDX-CUR is designed for exploring the basic principles of electricity. Use Go Direct Current to measure currents in low voltage AC and DC circuits. With a range of ±1 A, this sensor is ideal for use in most “battery and bulb” circuits. It features:
- Bluetooth and USB connectivity for easy data collection and analysis
- ±1 A and ±0.
1
connected.
7. Click or tap Done to enter data-
collection mode.
Charging the Sensor
Connect Go Direct Current to the included USB Charging Cable and any USB
device for two hours.
You can also charge up to eight Go Direct Current Probes using our GoDirect
Charge Station, sold separately (order code: GDX-CRG). An LED on each Go
Direct Current indicates charging status.
Charging
Orange LED next to the battery icon is solid
while the sensor is charging.
Fully charged
Green LED next to the battery icon is solid
when the sensor is fully charged.
Powering the Sensor
Turning on the sensor
Press button once. Red LED indicator flashes
when unit is on.
Putting the sensor in sleep
mode
Press and hold button for more than three
seconds to put into sleep mode. Red LED
indicator stops flashing when sleeping.
Connecting the Sensor
See the following link for up-to-date connection information:
www.vernier.com/start/gdx-cur
Connecting via Bluetooth
Ready to connect Red LED next to the Bluetooth icon flashes
when sensor is awake and ready to connect.
Connected Green LED next to the Bluetooth icon flashes
when sensor is connected via Bluetooth.
Go Direct
®
Current
(Order Code GDX-CUR)
Go Direct Current is designed for exploring
the basic principles of electricity. Use Go
Direct Current to measure currents in low
voltage AC and DC circuits. With a range of
±1 A, this sensor is ideal for use in most
“battery and bulb” circuits.
Note: Vernier products are designed for educational use. Our products are not
designed nor are they recommended for any industrial, medical, or commercial
process such as life support, patient diagnosis, control of a manufacturing
process, or industrial testing of any kind.
What's Included
l Go Direct Current
l Micro USBCable
Compatible Software
See www.vernier.com/manuals/gdx-cur for a list of software compatible with
GoDirectCurrent.
Getting Started
Please see the following link for platform-specific connection information:
www.vernier.com/start/gdx-cur
Bluetooth Connection USB Connection
1. Install Graphical Analysis 4 on
your computer, Chromebook™, or
mobile device. See
www.vernier.com/ga4 for software
availability.
2. Charge your sensor for at least
2hours before first use.
3. Turn on your sensor by pressing
the power button once. The
Bluetooth
®
LED will blink red.
4. Launch Graphical Analysis 4.
5. Click or tap Sensor Data
Collection.
6. Click or tap your Go Direct sensor
from the list of Discovered
Wireless Devices. Your sensor's ID
is located near the barcode on the
sensor. The Bluetooth LED will
blink green when it is successfully
1. Install Graphical Analysis 4 on your
computer or Chromebook. If using
LabQuest 2, make sure LabQuest
App is up to date. See
www.vernier.com/ga4 for software
availability or
www.vernier.com/downloads to
update LabQuest App.
2. Connect the sensor to the USB port.
3. Launch Graphical Analysis 4 or turn
on LabQuest 2. You are now ready
to collect data.
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Specifications
Current Probe range ±1 A and ±0.1 A
Maximum voltage on any
input
±10 V
Maximum non-damaging
current
1.5 A and 0.5 A
Input impedance (between
inputs)
0.1 Ω (±1 A range) and 1 Ω (±0.1 A range)
Input impedance (to
ground)
10 MΩ
Linearity 0.01%
Resolution 0.031 mA (±1 A range) and 0.003 mA (±0.1 A
range)
Battery 300 mA Li-Poly
Battery life (single full
charge)
~24 hours
Battery life (long term) ~500 full charge cycles (several years depending
on usage)
Care and Maintenance
Battery Information
Go Direct Current contains a small lithium-ion battery. The system is designed
to consume very little power and not put heavy demands on the battery.
Although the battery is warranted for one year, the expected battery life should
be several years. Replacement batteries are available from Vernier (order code:
GDX-BAT-300).
Storage and Maintenance
To store Go Direct Current for extended periods of time, put the device in sleep
mode by holding the button down for at least three seconds. The red LED will
stop flashing to show that the unit is in sleep mode. Over several months, the
battery will discharge but will not be damaged. After such storage, charge the
device for a few hours, and the unit will be ready to go.
Exposing the battery to temperatures over 35°C (95°F) will reduce its lifespan. If
possible, store the device in an area that is not exposed to temperature extremes.
Water Resistance
Go Direct Current is not water resistant and should never be immersed in water.
If water gets into the device, immediately power the unit down (press and hold
the power button for more than three seconds). Disconnect the sensor and
charging cable, and remove the battery. Allow the device to dry thoroughly
Connecting via USB
Connected and charging Orange LED next to the battery icon is solid
when the sensor is connected to Graphical Ana-
lysis via USB and the unit is charging. LED next
to Bluetooth icon is off.
Connected, fully charged Green LED next to the battery icon is solid
when the sensor is connected to Graphical Ana-
lysis via USB and fully charged. LED next to
Bluetooth icon is off.
Charging via USB,
connected via Bluetooth
Orange LED next to the battery icon is solid
when the sensor is charging. Green LED next to
the Bluetooth icon flashes.
Identifying the Sensor
When two or more sensors are connected, the sensors can be identified by
tapping or clicking Identify in Sensor Information.
Using the Product
Connect the sensor following the steps in the Getting Started section of this user
manual.
Go Direct Current was designed to be wired in series with the circuit. Currents
in either direction can be measured. The current will be indicated as positive if
current flows in the direction of the arrow on the box (from the red lead to the
black lead).
Go Direct Current has two ranges. The ±1 A (±1000 mA) range is suitable for
most circuit experiments and will likely be the range you use most often. The
±0.1 A (±100 mA) range is useful for experiments where you expect very small
electric currents, such as electromagnetically-induced currents. Switch between
the ranges by using the switch on the base of the sensor. Note: The range
setting is not indicated in Graphical Analysis. If currents greater than 100mA
are measured on the smaller range, the data will flat-line just above 100mA.
Calibrating the Sensor
You should not have to perform a new calibration when using Go Direct
Current in the classroom. A stored calibration is set for the sensor before it is
shipped.
However, you may consider “zeroing” the sensor before the start of an
experiment. This is done by shorting out the leads of the sensor, then choosing
the Zero option in the data-collection software. This option adjusts the
calibration offset but does not adjust the calibration gain.
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you help prevent potential negative consequences on human health or on the
environment. The recycling of materials will help to conserve natural resources.
For more detailed information about recycling this product, contact your local
city office or your disposal service.
Battery recycling information is available at www.call2recycle.org
Do not puncture or expose the battery to excessive heat or flame.
The symbol, shown here, indicates that this product must not be disposed of
in a standard waste container.
Federal Communication Commission Interference Statement
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC rules.
These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment
generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause
harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for help.
FCC Caution
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) this device may not cause harmful interference and
(2) this device must accept any interference received, including interference that may cause undesired operation
RF Exposure Warning
The equipment complies with RF exposure limits set forth for an uncontrolled environment. The antenna(s) used for this transmitter must
not be co-located or operating in conjunction with any other antenna or transmitter. You are cautioned that changes or modifications not
expressly approved by the party responsible for compliance could void your authority to operate the equipment.
IC Statement
This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions:
(1) this device may not cause interference, and
(2) this device must accept any interference, including interference that may cause undesired operation of the device.
Industry Canada - Class B This digital apparatus does not exceed the Class B limits for radio noise emissions from digital apparatus
as set out in the interference-causing equipment standard entitled “Digital Apparatus,” ICES-003 of Industry Canada. Operation is subject
to the following two conditions: (1) this device may not cause interference, and
(2) this device must accept any interference, including interference that may cause undesired operation of the device.
To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically
radiated power (e.i.r.p.) is not more than that permitted for successful communication.
RF exposure warning: The equipment complies with RF exposure limits set forth for an uncontrolled environment. The antenna(s) used
for this transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
Le présent appareil est conforme aux CNR d’Industrie Canada applicables aux appareils radio exempts de licence. L’exploitation est
autorisée aux deux conditions suivantes :
(1) l’appareil ne doit pas produire de brouillage, et
(2) l’appareil doit accepter tout interférence radioélectrique, même si cela résulte à un brouillage susceptible d’en compromettre le
fonctionnement.
Cet appareil numérique respecte les limites de bruits radioélectriques applicables aux appareils numériques de Classe B prescrites dans
la norme sur le matériel interférant-brouilleur: “Appareils Numériques,” NMB-003 édictée par industrie Canada. L’utilisation est soumise
aux deux conditions suivantes:
(1) cet appareil ne peut causer d’interférences, et
(2) cet appareil doit accepter toutes interférences, y comprises celles susceptibles de provoquer un disfonctionnement du dispositif.
Afin de réduire les interférences radio potentielles pour les autres utilisateurs, le type d’antenne et son gain doivent être choisie de telle
façon que l’équivalent de puissance isotrope émis (e.i.r.p) n’est pas plus grand que celui permis pour une communication établie.
before attempting to use the device again. Do not attempt to dry using an
external heat source.
How the Sensor Works
Go Direct Current contains a sensing element and signal conditioning amplifier.
The sensing element is a 0.1 Ω (or 1 Ω , for the smaller range) resistor connected
between the red and black leads. As the current passes through the resistor, a
small potential difference is measured across this resistor. This potential
difference is input to the signal conditioning amplifier. The final result is that a
voltage is produced from the amplifier that can be measured by sensor.
Troubleshooting
If Go Direct Current is not operating as expected, connect the sensor to
Graphical Analysis either via Bluetooth or USB. Connect Go Direct Current to
a DC power supply in series with a known resistance. Use a voltage probe or
voltmeter to measure the voltage of the supply. Compare the measured current
against the current calculated from Ohm’s law. Note: We recommend a battery
for this test, since some DC power supplies may not deliver clean DC voltage.
For additional troubleshooting and FAQs, see www.vernier.com/til/4060
Repair Information
If you have watched followed the troubleshooting steps and are still having
trouble with your Go Direct Current, contact Vernier Technical Support at
support@vernier.com or call 888-837-6437. Support specialists will work with
you to determine if the unit needs to be sent in for repair. At that time, a Return
Merchandise Authorization (RMA) number will be issued and instructions will
be communicated on how to return the unit for repair.
Accessories/Replacements
Item Order Code
Micro USB Cable
CB-USB-MICRO
USB-C to Micro USBCable
CB-USB-C-MICRO
Go Direct 300 mAh Replacement Battery
GDX-BAT-300
Warranty
Vernier warrants this product to be free from defects in materials and
workmanship for a period of five years from the date of shipment to the
customer. This warranty does not cover damage to the product caused by abuse
or improper use. This warranty covers educational institutions only.
Disposal
When disposing of this electronic product, do not treat it as household waste. Its
disposal is subject to regulations that vary by country and region. This item
should be given to an applicable collection point for the recycling of electrical
and electronic equipment. By ensuring that this product is disposed of correctly,
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Avertissement d’exposition RF: L’équipement est conforme aux limites d’exposition aux RF établies pour un environnement non
supervisé. L’antenne (s) utilisée pour ce transmetteur ne doit pas être jumelés ou fonctionner en conjonction avec toute autre antenne ou
transmetteur.
Note: This product is a sensitive measurement device. For best results, use the cables that were provided. Keep the device away from
electromagnetic noise sources, such as microwaves, monitors, electric motors, and appliances.
Vernier Software & Technology
13979 SW Millikan Way • Beaverton, OR 97005-2886
Toll Free (888) 837-6437 • (503) 277-2299 • Fax (503) 277-2440
info@vernier.com • www.vernier.com
Rev. 4/2/2018
Go Direct, Graphical Analysis, LabQuest, and other marks shown are our trademarks or registered trademarks in
the United States. All other marks not owned by us that appear herein are the property of their respective
owners, who may or may not be affiliated with, connected to, or sponsored by us.
The Bluetooth
®
word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc. and any use of
such marks by Vernier Software & Technology is under license. Other trademarks and trade names are those of
their respective owners.
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Vernier GDX-CUR
Vernier GDX-CUR is designed for exploring the basic principles of electricity. Use Go Direct Current to measure currents in low voltage AC and DC circuits. With a range of ±1 A, this sensor is ideal for use in most “battery and bulb” circuits. It features:
- Bluetooth and USB connectivity for easy data collection and analysis
- ±1 A and ±0.
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